Zircons MultiScanner i320 OneStep Center Finding Wall Scanner quickly and easily locates the center and edges of wood and metal studs and joists behind walls, floors and ceilings up to 1-1/2-Inch depth. It also locates metal targets up to 3-Inch deep. A 3-mode switch makes it easy makes it easy to change functions, while the display, SpotLite Pointing System, and audio tone all indicate the location of the target. A signal strength indicator helps distinguish between shallow and deep targets. WireWarning detection works continuously in all modes and indicates the presence of live, unshielded electrical wire up to 2-Inch deep.